Alex Pettyfer ("Beastly") plays the earthbound extraterrestrial who's on the run from others who want to eliminate him, after three others of his kind have met that fate. Dianna Agron ("Glee") also stars as a high-school peer who helps him, at considerable peril to herself, and Timothy Olyphant ("Justified") portrays his guardian. DVD extras: "making-of" documentary; outtakes. ** (PG-13: P, V) (Also on Blu-ray)